A child and sled with a combined mass of 49.20 kg slide, Ask an Expert

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Q1. If the four-engine jet accelerates down the runway at 4 m/s2 and one of the jet engines fails, how much acceleration would the other three produce?

Q2. A 30 kg loudspeaker is suspended 3.0 m below the ceiling by two cables that are each 60 degrees from vertical. What is the tension in the cables?

Q3. A child and sled with a combined mass of 49.20 kg slide down a frictionless hill that is 7.38 m high. If the sled starts from rest, what is its speed at the bottom of hill?

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